/* $NetBSD: nsphyter.c,v 1.28 2008/01/20 07:58:19 msaitoh Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 1997 Manuel Bouyer. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include /* * Driver for the National Semiconductor's DP83843, DP83847 and DP83849 * `PHYTER' Ethernet 10/100 PHYs * Data Sheets are available from http://www.national.com * * We also support the DP83815 `MacPHYTER' internal PHY since, for our * purposes, they are compatible. */ #include #include #include #include #include #include #include #include #include #include #include #include "miidevs.h" #include #include "miibus_if.h" static device_probe_t nsphyter_probe; static device_attach_t nsphyter_attach; static device_method_t nsphyter_methods[] = { /* device interface */ DEVMETHOD(device_probe, nsphyter_probe), DEVMETHOD(device_attach, nsphyter_attach), DEVMETHOD(device_detach, mii_phy_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD_END }; static driver_t nsphyter_driver = { "nsphyter", nsphyter_methods, sizeof(struct mii_softc) }; DRIVER_MODULE(nsphyter, miibus, nsphyter_driver, 0, 0); static int nsphyter_service(struct mii_softc *, struct mii_data *, int); static void nsphyter_status(struct mii_softc *); static void nsphyter_reset(struct mii_softc *); static const struct mii_phydesc nsphyters[] = { MII_PHY_DESC(xxNATSEMI, DP83815), MII_PHY_DESC(xxNATSEMI, DP83843), MII_PHY_DESC(xxNATSEMI, DP83847), MII_PHY_DESC(xxNATSEMI, DP83849), MII_PHY_END }; static const struct mii_phy_funcs nsphyter_funcs = { nsphyter_service, nsphyter_status, nsphyter_reset }; static int nsphyter_probe(device_t dev) { return (mii_phy_dev_probe(dev, nsphyters, BUS_PROBE_DEFAULT)); } static int nsphyter_attach(device_t dev) { mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &nsphyter_funcs, 1); return (0); } static int nsphyter_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { switch (cmd) { case MII_POLLSTAT: break; case MII_MEDIACHG: mii_phy_setmedia(sc); break; case MII_TICK: if (mii_phy_tick(sc) == EJUSTRETURN) return (0); break; } /* Update the media status. */ PHY_STATUS(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return (0); } static void nsphyter_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; struct ifmedia_entry *ife = mii->mii_media.ifm_cur; int bmsr, bmcr, physts; mii->mii_media_status = IFM_AVALID; mii->mii_media_active = IFM_ETHER; bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); physts = PHY_READ(sc, MII_NSPHYTER_PHYSTS); if ((physts & PHYSTS_LINK) != 0) mii->mii_media_status |= IFM_ACTIVE; bmcr = PHY_READ(sc, MII_BMCR); if ((bmcr & BMCR_ISO) != 0) { mii->mii_media_active |= IFM_NONE; mii->mii_media_status = 0; return; } if ((bmcr & BMCR_LOOP) != 0) mii->mii_media_active |= IFM_LOOP; if ((bmcr & BMCR_AUTOEN) != 0) { /* * The media status bits are only valid if autonegotiation * has completed (or it's disabled). */ if ((bmsr & BMSR_ACOMP) == 0) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } if ((physts & PHYSTS_SPEED10) != 0) mii->mii_media_active |= IFM_10_T; else mii->mii_media_active |= IFM_100_TX; if ((physts & PHYSTS_DUPLEX) != 0) mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); else mii->mii_media_active |= IFM_HDX; } else mii->mii_media_active = ife->ifm_media; } static void nsphyter_reset(struct mii_softc *sc) { struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; int reg, i; if ((sc->mii_flags & MIIF_NOISOLATE) != 0) reg = BMCR_RESET; else reg = BMCR_RESET | BMCR_ISO; PHY_WRITE(sc, MII_BMCR, reg); /* * It is best to allow a little time for the reset to settle * in before we start polling the BMCR again. Notably, the * DP8384{3,7} manuals state that there should be a 500us delay * between asserting software reset and attempting MII serial * operations. Be conservative. Also, a DP83815 can get into * a bad state on cable removal and reinsertion if we do not * delay here. */ DELAY(1000); /* * Wait another 2s for it to complete. * This is only a little overkill as under normal circumstances * the PHY can take up to 1s to complete reset. * This is also a bit odd because after a reset, the BMCR will * clear the reset bit and simply reports 0 even though the reset * is not yet complete. */ for (i = 0; i < 1000; i++) { reg = PHY_READ(sc, MII_BMCR); if (reg != 0 && (reg & BMCR_RESET) == 0) break; DELAY(2000); } if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { if ((ife == NULL && sc->mii_inst != 0) || (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); } }